Tuesday, March 22, 2011

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Updating Group Membership “Dynamically”

2 comments

I have created this script based on a question posted on the .  This script can be used to “dynamically” update the group member based of a LDAP attribute. 

In this example, I will be adding users who have the location attributes (l) populated with “SiteA” value into a security group called SiteA. 

The following command will remove the existing group members from SiteA group. 

dsget group "CN=SiteA,OU=TestOU,DC=Infralab, DC=local" -members | dsmod group "CN=SiteA,OU=TestOU,DC=Infralab, DC=local" –rmmbr

image

and the following command will filter all objects based on the location code (l=SiteA) and add them to the SiteA group. 

dsquery * -Filter "(l=SiteA)" | dsmod group "CN=SiteA,OU=TestOU,DC=Infralab, DC=local" -addmbr

image

You can use the same logic to copy group members from one group to another.  Here is an exmaple:

dsget group "CN=Group1,OU=TestOU,DC=Infralab, DC=local" -members | dsmod group "CN=Group2,OU=TestOU,DC=Infralab, DC=local" -addmbr

The above command will copy members from Group1 to Group2.

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Santhosh Sivarajan

Microsoft MVP · Identity & Cybersecurity Architect

Santhosh has 30+ years of hands-on enterprise experience in Identity and Access Management, Microsoft Entra ID, Active Directory, Microsoft 365 and Zero Trust architecture. He is the author of two books on Windows Server and security, and leads consulting, assessments and training at SAG Business Group.

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2 comments:

Hello.

Is it possible to exclude users who belong the group already?

I would appreciate it shows me how to do it.

Regards

I am having a problem using the first of these commands, I am getting the "dsmod failed:You must specify at least one attribute to be modified."

here is my exact command issued via powershell

dsget group "CN=grp.sig.retail,OU=SignatureGroups,OU=GroupsAndUsers,DC=americanchartered,DC=com" -members | dsmod group "CN=grp.sig.retail,OU=SignatureGroups,OU=GroupsAndUsers,DC=americanchartered,DC=com" –rmmbr

that fails with the above error, running the first part before the pipe returns a list of the group members, as expected.

The CN is exatly the same as I "copy and pasted" it from the DSGET part of the command.

Any help would be greatly appreciated

Thanks Bob Sawyer

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